### Bookshelf

Total GMAT MathJeff's complete Quant guide, on sale now! |

Total GMAT VerbalEverything you need to ace GMAT Verbal! |

**1,800 Practice Math Questions**

Buy Jeff's books at Amazon.com

GMAT Official Guide, with IR

OG Math | OG Verbal

OG12 & Quant Rev solutions!

**GMAT Question of the Day**

Beginner's Guide to the GMAT

GMAT Hacks Affiliate Program

### Categories

- General Study Tips
- Goals and Planning
- CAT Strategy
- The Mental Game
- GMAT Math Strategy
- GMAT Math Topics
- Mental Math
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## Data Sufficiency Hacks

- GMAT Data Sufficiency: General or Specific?
- Improve Your Abstract Thinking Skills
- GMAT Data Sufficiency: Know the Test
- Common Exponents in GMAT Data Sufficiency
- Data Sufficiency (Beginner's Guide)

- Identical Data Sufficiency Statements
- Count the Variables, Count the Equations
- Data Sufficiency Diagrams
- The #1 GMAT Data Sufficiency Trap
- Data Sufficiency is Hard

- Can Two Data Sufficiency Statements Contradict Each Other?
- The Data Sufficiency Content Surprise